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Note 3 - Prepaid and Other Current Assets (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

June 30,

  

December 31,

 
  

2024

  

2023

 

Prepaid insurance

 $5  $759 

Contract research organization and other deposits

  7,432   6,489 

Interest receivable

  1,433   962 

Insurance recoveries

  5,800    

Other

  161   287 

Total prepaid expenses and other current assets

 $14,831  $8,497